Comparisons and Comments on Electron and Ion Impact Profiles of Spectral Lines

Sahal-Brechot, S and Dimitrijevic, Milan S and Nessib, Nebil Ben (2011) Comparisons and Comments on Electron and Ion Impact Profiles of Spectral Lines. Baltic Astronomy, 20 (4). pp. 523-530. ISSN 1392-0049 (FP7- 239108)

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Abstract

Stark broadening theory is currently operated for calculating widths and shifts of spectral lines that are needed for spectroscopic diagnostics and modelling in astrophysics, laboratory and technological plasmas. We have calculated a great number of data, obtained through the impact semiclassical perturbation theory: tables have been published for neutral atom and ion emitters, and typical temperatures, electron and ion densities. They are currently implemented in the STARK-B database which participates to the European effort within the VAMDC (Virtual Atomic and Molecular data Centre). Despite of that, a great number of data are still missing and their orders of magnitude would at least be welcome. In the present paper, we will revisit and compare the orders of magnitudes and trends of the impact Stark widths and shifts, by considering their semiclassical perturbation expressions. We will also provide fitting formulae which are essential for the modelling codes of stellar atmospheres and envelopes.

Keywords

atomic data; atomic processes; line: profiles; astronomical databases

Item Type:	Article
FP7 Grant Agreement Number:	239108
FrameWork Programmes:	SP4-Capacities
Scientific Areas:	Research Infrastructures
Contact Email Address:	sylvie.sahal-brechot@obspm.fr
Last Modified:	26 Sep 2012 10:03
Access rights:	Open access
Output type:	Article
URI:	http://eprints.kobson.nb.rs/id/eprint/21

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